Now a research team said there’s new evidence that resolves the case. The latest clue comes from a complete skeleton — first ...

The fossil skull of a mystery tyrannosaur has been the subject of debate since it was discovered in the 1940s.

At the twilight of the age of dinosaurs, an agile and vicious predator named Nanotyrannus prowled western North America, ...

The Nanotyrannus genus has been debated for decades, with some paleontologists arguing that specimens thus classified are ...